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Mystery Signal Could be Dark Matter Hint in ISS Detector

Mystery Signal Could be Dark Matter Hint in ISS Detector

Analysis of 41 billion vast rays distinguished a Alpha Magnetic Spectrometer molecule detector aboard a International Space Station shows an different phenomena that is “consistent with a dim matter particle” famous as a neutralino, researchers announced Thursday.

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Key to a hunt is a ratio of positrons to electrons and so distant a justification from AMS points in a instruction of dim matter.

Positrons are a anti-matter counterparts to electrons.

The smoking gun scientists demeanour for is a arise in a ratio of positrons to electrons, followed by a thespian tumble — a revealing pointer of dim matter annihilating a Milky Way’s halo, that lies over a executive hoop of stars and dust, according to Michael Turner, executive of a Kavli Institute for Cosmological Physics during a University of Chicago.

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If stream fanciful models are correct, a large pool of dim matter — maybe as large as 1 million light-years opposite — envelops a manifest galaxy, that is about 100,000 light-years in diameter.

Visible matter, such as stars and galaxies, contain reduction than 5 percent of a sum mass in a universe. The rest is dim matter and an anti-gravity force referred to as dim energy. AMS is looking for justification of dim matter neutralinos, that — if they exist — should hit with one another and recover charged particles that AMS can detect.

“We have not found a decisive explanation of dim matter,” AMS lead researcher Samuel Ting, with a Massachusetts Institute of Technology and CERN in Switzerland, wrote in an email to Discovery News.

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“Whereas all a AMS formula indicate in a right direction, we still need to magnitude how fast a atom fragment falls off during a top energies in sequence to order out astrophysical sources such as pulsars,” pronounced Ting, a Nobel laureate who oversees a AMS group in 60 institutes from 16 countries.

A second line of justification will come from arriving measurements of a ratio between antiprotons and protons, that further can order out pulsars as a appetite source.

The AMS was commissioned on a space hire during a next-to-last space convey goal in May 2011. Since then, a $2 billion instrument has been aggregation a towering of information from 54 billion vast ray events, 41 billion of that have been analyzed. Of those, 10 million particles were identified as electrons and positrons.

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Over a life of a space station, AMS is approaching to magnitude hundreds of billions of vast rays.

The AMS is not a usually instrument on a hunt for dim matter. The Large Hadron Collider, for example, aims to furnish a primogenitor and grandparent particles of dim matter. LHC is being returned to use after a two-year shutdown for upgrades.

The AMS formula are published in Physical Review Letters.

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